Upgrade libxml2 and its portage dependencies

sys-libs/zlib/zlib-1.2.5-r2.ebuild

+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/sys-libs/zlib/zlib-1.2.5-r2.ebuild,v 1.8 2011/03/27 19:00:39 ranger Exp $
+
+inherit eutils toolchain-funcs
+
+DESCRIPTION="Standard (de)compression library"
+HOMEPAGE="http://www.zlib.net/"
+SRC_URI="http://www.gzip.org/zlib/${P}.tar.bz2
+        http://www.zlib.net/${P}.tar.bz2"
+
+LICENSE="ZLIB"
+SLOT="0"
+KEYWORDS="alpha amd64 ~arm ~hppa ~ia64 ~m68k ~mips ppc ~ppc64 ~s390 ~sh ~sparc x86 ~sparc-fbsd ~x86-fbsd"
+IUSE=""
+
+RDEPEND="!<dev-libs/libxml2-2.7.7" #309623
+
+src_unpack() {
+        unpack ${A}
+        cd "${S}"
+        # trust exit status of the compiler rather than stderr #55434
+        # -if test "`(...) 2>&1`" = ""; then
+        # +if (...) 2>/dev/null; then
+        sed -i 's|\<test "`\([^"]*\) 2>&1`" = ""|\1 2>/dev/null|' configure || die
+
+        epatch "${FILESDIR}"/${P}-ldflags.patch #319661
+        epatch "${FILESDIR}"/${P}-lfs-decls.patch #316377
+        epatch "${FILESDIR}"/${P}-fbsd_chosts.patch #316841
+}
+
+src_compile() {
+        case ${CHOST} in
+        *-mingw*|mingw*)
+                emake -f win32/Makefile.gcc STRIP=true PREFIX=${CHOST}- || die
+                sed \
+                        -e 's|@prefix@|/usr|g' \
+                        -e 's|@exec_prefix@|${prefix}|g' \
+                        -e 's|@libdir@|${exec_prefix}/'$(get_libdir)'|g' \
+                        -e 's|@sharedlibdir@|${exec_prefix}/'$(get_libdir)'|g' \
+                        -e 's|@includedir@|${prefix}/include|g' \
+                        -e 's|@VERSION@|'${PV}'|g' \
+                        zlib.pc.in > zlib.pc || die
+                ;;
+        *)      # not an autoconf script, so can't use econf
+                ./configure --shared --prefix=/usr --libdir=/usr/$(get_libdir) || die
+                emake || die
+                ;;
+        esac
+}
+
+src_install() {
+        case ${CHOST} in
+        *-mingw*|mingw*)
+                emake -f win32/Makefile.gcc install \
+                        BINARY_PATH="${D}/usr/bin" \
+                        LIBRARY_PATH="${D}/usr/$(get_libdir)" \
+                        INCLUDE_PATH="${D}/usr/include" \
+                        SHARED_MODE=1 \
+                        || die
+                insinto /usr/share/pkgconfig
+                doins zlib.pc || die
+                ;;
+
+        *)
+                emake install DESTDIR="${D}" LDCONFIG=: || die
+                gen_usr_ldscript -a z
+                ;;
+        esac
+
+        dodoc FAQ README ChangeLog doc/*.txt
+}